-53.87% is the change from 839 to 387
Calculation steps:
[( 387 - 839 ) ÷ 839] x 100 = -53.87%
Formula
Percentage change = [(387 - 839) / 839] x 100
Subtract the new number by the original number
387 - 839 = -452
-452 ÷ 839 = -0.5387365911799762
-0.5387365911799762 x 100 = -53.87%